Oil Pressure

[cv70chall]

I did a starter upgrade several years ago to the smaller hi-torque style starter for my Challenger and have noticed that the oil pressure on my aftermarket gauge seems to be high- 70-80psi for about 10 minutes and then settles down to between 40-60psi. I was initially "told" to start the car, shut it off- wait about 20 seconds and start it again before driving. (?) Would this have anything to do with the starter?
Thanks

 

[pschlosser]

Whomever gave you that advice, out of context, it seems a tad psycho, to me. I cannot think of any way the starter motor would impact operating engine oil pressure. I don't think the starter has anything to do with the oil pressure.

What you describe with oil pressure, I've seen many, many times on older and wearing engines. When the engine is cold, varying tolerances in the engine may be tighter than when warm. Further, as the engine oil heats up, it (thins and) flows differently resulting in a slight drop in pressure. Add those things together, and at idle, the oil pressure can read quite a bit lower on a warm/hot engine compared to a cold one.

 

[Steve340]

I would not bother to start the engine twice - most wear occurs when the engine and oil are cold during the first 10 minutes of running.
The starter should in no way affect the engine oil pressure.

 

[Xcudame]

Sounds like normal start up pressure and warm pressure to me. Starter has zero affect on oil pressure. Now if it dropped to single digits after warming up, you've got a problem. So drive your Challenger and enjoy!

 

[Steve340]

What grade of oil is in the engine for example 20W-50?

 

[WFHDANB426]

I did a starter upgrade several years ago to the smaller hi-torque style starter for my Challenger and have noticed that the oil pressure on my aftermarket gauge seems to be high- 70-80psi for about 10 minutes and then settles down to between 40-60psi. I was initially "told" to start the car, shut it off- wait about 20 seconds and start it again before driving. (?) Would this have anything to do with the starter?
Thanks

Like the other replies said the starter has nothing to do with the oil pressure. Your oil pressure readings sound reasonable to me.
I raced my Chrysler Kit Car in 1980 and it had 100 psi cold oil pressure with the dual pickup oil pump with Hemi rotors & Quaker State 30 WT Racing Oil and prob 60 psi hot oil pressure idling but I ran that engine at 7,500 RPM. The synthetic oils are so good these days that less oil pressure is probably fine. I used Mobil 1 synthetic oil for many years and now I use Pennzoil Ultra Platinum but these are just my personal choices and opinions. Now I write songs and on youtube if you search:WFHDANB426 you can hear my three Cuda songs.

 

[aussiemark]

Cold oil is thicker then hot oil once the oil is up to operating temperature the pressure will be a bit less this is normal for any engine. Old engine builder rule is you want 10 psi per 1000rpm for so yours is good for around 5000rpm sounds good to me.

 

[aussiemark]

I do remember reading about a special race engine that needed the oil and coolant to be pre heated before start up they said if it was started with cold fluids it would cause engine damage very interesting.

 

[rogue]

formula one engines have the fluids pre-heated